JP2014527863A - バイタルサインのリモートモニタリング - Google Patents
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Abstract
Description
ビデオカメラを使用して被検体の身体上の関心領域を撮像するステップであって、それにより、前記関心領域から反射される周囲光内の周期的強度変動を含むPPG画像信号を取得する、ステップと、
同じ前記ビデオカメラを使用して前記被検体の身体上ではない基準関心領域を撮像するステップであって、それにより、基準信号を取得する、ステップと、
自己回帰(AR)全極モデルを使用して前記基準をスペクトル的に解析するとともに、スペクトル成分に対応する極を識別するステップと、
自己回帰(AR)全極モデルを使用して前記PPG画像信号をスペクトル的に解析して該PPG画像信号内のスペクトル成分に対応する極を識別するとともに、前記基準信号のスペクトル成分として識別される極に対応する極を削除するステップと、
を含む、PPG画像信号内の周囲光干渉を抑制する方法を提供する。
である。
ここで、fsはサンプリング周波数であり、マグニチュードrは(x2+y2)1/2である。
から取得され得る。ここで、スコアは、各パラメーターについて、図12上のそのパラメーターについてのプロット上のy軸から読取られる。
Claims (21)
- ビデオカメラを使用して被検体の皮膚上の関心領域を撮像するステップであって、それにより、前記関心領域から反射される周囲光内の周期的強度変動を含むフォトプレチスモグラフィック画像信号を取得する、ステップと、
前記ビデオカメラを使用して前記被検体の皮膚上ではない基準関心領域を撮像するステップであって、それにより基準信号を取得する、ステップと、
自己回帰全極モデルを使用して前記基準をスペクトル的に解析するとともに、スペクトル成分に対応する極を識別するステップと、
自己回帰全極モデルを使用して前記フォトプレチスモグラフィック画像信号をスペクトル的に解析して該フォトプレチスモグラフィック画像信号内のスペクトル成分に対応する極を識別するとともに、前記基準信号のスペクトル成分として識別される極に対応する極を無視するステップと、
を含む、フォトプレチスモグラフィック画像信号内の周囲光干渉を抑制する方法。 - 前記基準信号及び前記フォトプレチスモグラフィック画像信号は、前記ビデオカメラの赤チャネル、緑チャネル、及び青チャネルの少なくとも1つのチャネルからの出力信号又は別のカメラからの赤外線チャネルからの出力信号である、請求項1に記載の方法。
- 前記被検体の皮膚上の複数の関心領域を撮像するとともに、複数の基準関心領域を撮像するステップを更に含む、請求項1又は2に記載の方法。
- 前記各関心領域は、単一のカメラピクセルに中心がある、請求項3に記載の方法。
- 前記フォトプレチスモグラフィック画像信号の残りの成分からバイタルサインを取得するステップを更に含む、請求項1〜4のいずれか1項に記載の方法。
- 前記基準信号及び前記フォトプレチスモグラフィック画像信号はそれぞれ、複数の異なる次数のモデルを使用して解析される、請求項1〜5のいずれか1項に記載の方法。
- 前記複数の異なる次数のモデルは、次数8〜20のモデルを含む、請求項6に記載の方法。
- 前記識別された極に対応するスペクトル成分は、前記複数の異なる次数モデルにわたって平均される、請求項6又は7に記載の方法。
- 前記基準信号内に存在しない前記フォトプレチスモグラフィック画像信号内の極を識別することによって、前記被検体の心拍数の測定値を取得するステップを更に含む、請求項1〜8のいずれか1項に記載の方法。
- 前記心拍数の測定値は、HRmin〜HRmaxの範囲の周波数(通常、0.67Hz〜4Hz)を有するスペクトル成分に対応する極を識別することによって取得される、請求項9に記載の方法。
- 前記被検体からフォトプレチスモグラフィック信号を取得するステップと、複数の異なる次数の自己回帰全極モデルを使用して前記フォトプレチスモグラフィック信号をスペクトル的に解析して、前記各モデルから心拍数を示すスペクトル成分を識別するとともに前記スペクトル成分に対応する心拍数推定値を生成するステップと、前記複数の異なるモデルからの前記心拍数の前記推定値を融合させるステップであって、それにより、ロバストな心拍数推定値を生成する、ステップと、を含む、人間又は動物被検体の心拍数の推定値を取得する方法。
- 前記融合させるステップは、前記複数の異なるモデルからの前記心拍数推定値のメジアンをとることを含む、請求項11に記載の方法。
- 前記フォトプレチスモグラフィック信号はフォトプレチスモグラフィック画像信号である、請求項11又は12に記載の方法。
- 別の全極モデルのセットを使用して前記フォトプレチスモグラフィック信号をスペクトル的に解析する前に、該フォトプレチスモグラフィック信号をローパスフィルタリングし、ダウンサンプリングすることによって、前記被検者の呼吸数の測定値を取得するステップを更に含む、請求項1〜13のいずれか1項に記載の方法。
- 前記被検体からフォトプレチスモグラフィック信号を取得するステップと、複数の異なる次数の自己回帰全極モデルを使用して前記フォトプレチスモグラフィック信号をスペクトル的に解析する前に、該フォトプレチスモグラフィック信号をローパスフィルタリングし、ダウンサンプリングするステップであって、それにより、前記各モデルから呼吸数を示すスペクトル成分を識別する、ステップと、前記スペクトル成分に対応する呼吸数推定値を生成するステップと、前記複数の異なるモデルからの呼吸数の前記推定値を融合させるステップであって、それにより、ロバストな呼吸数推定値を生成する、ステップと、を含む、人間又は動物被検体の呼吸数の推定値を取得する方法。
- 前記被検体の皮膚上の前記関心領域から反射される2つの異なる波長の光の強度の比を取得することによって、前記被検体の血中酸素飽和度の測定値を取得するステップを更に含み、前記強度は、心拍数を示すとして識別される極のマグニチュードから取得される、請求項11〜15のいずれか1項に記載の方法。
- 前記2つの異なる波長は、ビデオカメラによって検出される赤波長及び緑波長である、請求項16に記載の方法。
- 前記2つの異なる波長は、前記ビデオカメラによって検出される赤波長及び第2のビデオカメラによって検出される赤外線波長を含む、請求項16に記載の方法。
- 請求項1又は請求項1に従属する任意の請求項の方法による被検体のフォトプレチスモグラフィック撮像及び周囲光干渉の抑制を含む方法によって被検体のバイタルサインの1つ又は複数の測定値を生成するようになっているコンピュータープログラム。
- 被検体のバイタルサインの1つ又は複数を、ビデオカメラを使用して前記被検体のフォトプレチスモグラフィックを撮像し、前記ビデオカメラによって取得される前記被検体の画像に関して顔認識プロセスを実施することによって測定する方法であって、それにより、前記被検体のアイデンティティを前記バイタルサイン測定値にリンクさせる、方法。
- 前記フォトプレチスモグラフィック撮像は、請求項1又は請求項1に従属する任意の請求項の方法による干渉の抑制を含む、請求項20に記載の方法。
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Application Number | Priority Date | Filing Date | Title |
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GB1114406.0 | 2011-08-22 | ||
GB201114406A GB201114406D0 (en) | 2011-08-22 | 2011-08-22 | Remote monitoring of vital signs |
PCT/GB2012/052004 WO2013027027A2 (en) | 2011-08-22 | 2012-08-16 | Remote monitoring of vital signs |
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JP2014527863A true JP2014527863A (ja) | 2014-10-23 |
JP6219279B2 JP6219279B2 (ja) | 2017-10-25 |
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JP2014526549A Active JP6219279B2 (ja) | 2011-08-22 | 2012-08-16 | バイタルサインのリモートモニタリング |
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EP (1) | EP2747633B1 (ja) |
JP (1) | JP6219279B2 (ja) |
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CN (1) | CN103826532B (ja) |
AU (1) | AU2012298362B2 (ja) |
BR (1) | BR112014004085A8 (ja) |
CA (1) | CA2880138A1 (ja) |
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KR20140058573A (ko) | 2014-05-14 |
JP6219279B2 (ja) | 2017-10-25 |
BR112014004085A2 (pt) | 2017-02-21 |
WO2013027027A3 (en) | 2013-04-18 |
WO2013027027A2 (en) | 2013-02-28 |
RU2014107350A (ru) | 2015-09-27 |
CA2880138A1 (en) | 2013-02-28 |
EP2747633A2 (en) | 2014-07-02 |
US20140303454A1 (en) | 2014-10-09 |
GB201114406D0 (en) | 2011-10-05 |
EP2747633B1 (en) | 2021-03-10 |
CN103826532A (zh) | 2014-05-28 |
US9615749B2 (en) | 2017-04-11 |
CN103826532B (zh) | 2016-06-22 |
AU2012298362B2 (en) | 2017-02-16 |
AU2012298362A1 (en) | 2014-02-27 |
BR112014004085A8 (pt) | 2018-01-02 |
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